package sso

import (
	"bytes"
	_ "embed"
	"encoding/base64"
	"encoding/xml"
	"net/url"
	"strings"
	"testing"
	"time"

	"github.com/crewjam/saml"
	dsig "github.com/russellhaering/goxmldsig"
	"github.com/stretchr/testify/require"
)

// testACSURL is the ACS URL for many of the SAMLResponses below.
var testACSURL, _ = url.Parse("https://localhost:8080/api/v1/kolide/sso/callback")

// The following variables are test samples from a Salesforce IdP response and metadata.
var (
	testSalesforceMetadata = func() *saml.EntityDescriptor {
		var metadata saml.EntityDescriptor
		if err := xml.Unmarshal([]byte(`
<?xml version="1.0" encoding="UTF-8"?>
  <md:EntityDescriptor xmlns:md="urn:oasis:names:tc:SAML:2.0:metadata" entityID="https://kolide-dev-ed.my.salesforce.com" validUntil="2027-04-29T19:22:40.750Z" xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
      <md:IDPSSODescriptor WantAuthnRequestsSigned="false" protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol">
         <md:KeyDescriptor use="signing">
            <ds:KeyInfo>
               <ds:X509Data>
                  <ds:X509Certificate>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</ds:X509Certificate>
               </ds:X509Data>
            </ds:KeyInfo>
         </md:KeyDescriptor>
         <md:NameIDFormat>urn:oasis:names:tc:SAML:1.1:nameid-format:unspecified</md:NameIDFormat>
         <md:SingleSignOnService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" Location="https://kolide-dev-ed.my.salesforce.com/idp/endpoint/HttpPost"/>
         <md:SingleSignOnService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect" Location="https://kolide-dev-ed.my.salesforce.com/idp/endpoint/HttpRedirect"/>
      </md:IDPSSODescriptor>
   </md:EntityDescriptor>
`), &metadata); err != nil {
			panic(err)
		}
		return &metadata
	}
	testResponse     = `<?xml version="1.0" encoding="UTF-8"?><samlp:Response xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol" Destination="https://localhost:8080/api/v1/kolide/sso/callback" ID="_c821c52e3d2d7ca21b2be6be948cdbb01493590106635" InResponseTo="3916979e-3ae2-4e83-87b4-fe2eb884b891" IssueInstant="2017-04-30T22:08:26.635Z" Version="2.0"><saml:Issuer xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion" Format="urn:oasis:names:tc:SAML:2.0:nameid-format:entity">https://kolide-dev-ed.my.salesforce.com</saml:Issuer><ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
<ds:SignedInfo>
<ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
<ds:SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/>
<ds:Reference URI="#_c821c52e3d2d7ca21b2be6be948cdbb01493590106635">
<ds:Transforms>
<ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/>
<ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"><ec:InclusiveNamespaces xmlns:ec="http://www.w3.org/2001/10/xml-exc-c14n#" PrefixList="ds saml samlp xs xsi"/></ds:Transform>
</ds:Transforms>
<ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
<ds:DigestValue>OZs1ttPjkJbqz2O2ou+h2Y+qEbk=</ds:DigestValue>
</ds:Reference>
</ds:SignedInfo>
<ds:SignatureValue>
V2iRZTHuJBj0gzF3c1GW0FcBbFTtAyVRixUgmGvkGLaG0AxIAfF8z7qmILNExp9DR2ISQykiBSzz
JABYQDE6OEzjNWNv2KclQ4cCEN9GHlxzlJ8vApC4lvEwhiP/N3wEJotFNSv1VQwF/uafgVzoSHyR
otXhBtjAcrKAWndEj9/t/uetJB8tvy9wro8mKtHeSbNbhgGpTH2TznRqqFxpKYQOoZtQ1hJNU+/t
LXeimlcsD+HqPz9HOG+7BnBYYe927WYEdjDAK85f067zCyOTf+zgTSI4+9YElmJ59VzDTpGy2dCU
L/drkJ8CIBJg6xzG5iP0lUFk/5NakrTqdm06Aw==
</ds:SignatureValue>
<ds:KeyInfo><ds:X509Data><ds:X509Certificate>MIIErDCCA5SgAwIBAgIOAVuhH3WkAAAAAB5NpvIwDQYJKoZIhvcNAQELBQAwgZAxKDAmBgNVBAMM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</ds:X509Certificate></ds:X509Data></ds:KeyInfo></ds:Signature><samlp:Status><samlp:StatusCode Value="urn:oasis:names:tc:SAML:2.0:status:Success"/></samlp:Status><saml:Assertion xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion" ID="_f2e9c3f7000c40f0241028ec904314861493590106636" IssueInstant="2017-04-30T22:08:26.636Z" Version="2.0"><saml:Issuer Format="urn:oasis:names:tc:SAML:2.0:nameid-format:entity">https://kolide-dev-ed.my.salesforce.com</saml:Issuer><ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
<ds:SignedInfo>
<ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
<ds:SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/>
<ds:Reference URI="#_f2e9c3f7000c40f0241028ec904314861493590106636">
<ds:Transforms>
<ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/>
<ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"><ec:InclusiveNamespaces xmlns:ec="http://www.w3.org/2001/10/xml-exc-c14n#" PrefixList="ds saml xs xsi"/></ds:Transform>
</ds:Transforms>
<ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
<ds:DigestValue>on7PgPxLJb8mlm/i+MDQMr1VYyY=</ds:DigestValue>
</ds:Reference>
</ds:SignedInfo>
<ds:SignatureValue>
RTAt2BGsfQEyIYu5UCQfhXql1XOfXx+h8+6sa3RM0CU5UXQPEV7yElEuvVQhGeZMjctxVLGPcgMV
KXTj03V4Dwfj/yht0HuGvKhAvPRIRrpUbRNQa3efC2vCCNGR7PGg3IYeer8FN5dBbfNBAmhAImvO
ZgWwd0JiiWQeyckxGAffcdFx8/QkGquZuKGFBC2gjIWFgqxLqk5E2Xx9rmnFjf6LeIj9HsGnZU1x
jLMly2KF2rPdlVduPiSZJ7ORceUrrj6aB8FSPTghkzgYUuqMkmacc9WaVmsMeLb7L/WI9A8xHqHs
VlNJwg6b1jW2wyUmfO5hUkq1okt9Sf1ROIMbag==
</ds:SignatureValue>
<ds:KeyInfo><ds:X509Data><ds:X509Certificate>MIIErDCCA5SgAwIBAgIOAVuhH3WkAAAAAB5NpvIwDQYJKoZIhvcNAQELBQAwgZAxKDAmBgNVBAMM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</ds:X509Certificate></ds:X509Data></ds:KeyInfo></ds:Signature><saml:Subject><saml:NameID Format="urn:oasis:names:tc:SAML:1.1:nameid-format:unspecified">john@kolide.co</saml:NameID><saml:SubjectConfirmation Method="urn:oasis:names:tc:SAML:2.0:cm:bearer"><saml:SubjectConfirmationData InResponseTo="3916979e-3ae2-4e83-87b4-fe2eb884b891" NotOnOrAfter="2017-04-30T22:13:26.643Z" Recipient="https://localhost:8080/api/v1/kolide/sso/callback"/></saml:SubjectConfirmation></saml:Subject><saml:Conditions NotBefore="2017-04-30T22:07:56.643Z" NotOnOrAfter="2017-04-30T22:13:26.643Z"><saml:AudienceRestriction><saml:Audience>kolide</saml:Audience></saml:AudienceRestriction></saml:Conditions><saml:AuthnStatement AuthnInstant="2017-04-30T22:08:26.637Z"><saml:AuthnContext><saml:AuthnContextClassRef>urn:oasis:names:tc:SAML:2.0:ac:classes:unspecified</saml:AuthnContextClassRef></saml:AuthnContext></saml:AuthnStatement><saml:AttributeStatement><saml:Attribute Name="userId" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:unspecified"><saml:AttributeValue xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="xs:anyType">0056A000000Q6Rl</saml:AttributeValue></saml:Attribute><saml:Attribute Name="username" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:unspecified"><saml:AttributeValue xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="xs:anyType">john@kolide.co</saml:AttributeValue></saml:Attribute><saml:Attribute Name="email" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:unspecified"><saml:AttributeValue xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="xs:anyType">john@kolide.co</saml:AttributeValue></saml:Attribute><saml:Attribute Name="is_portal_user" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:unspecified"><saml:AttributeValue xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="xs:anyType">false</saml:AttributeValue></saml:Attribute></saml:AttributeStatement></saml:Assertion></samlp:Response>`
	testRequestID    = "3916979e-3ae2-4e83-87b4-fe2eb884b891"
	testSAMLProvider = func() *saml.ServiceProvider {
		idpMetadata := testSalesforceMetadata()
		sp := saml.ServiceProvider{
			EntityID:    "https://fleet-dev-ed.my.salesforce.com",
			AcsURL:      *testACSURL,
			IDPMetadata: idpMetadata,
			ValidateAudienceRestriction: func(assertion *saml.Assertion) error {
				return nil
			},
		}
		return &sp
	}()
)

func TestVerfiyValidResponse(t *testing.T) {
	tm, err := time.Parse(time.UnixDate, "Sun Apr 30 22:09:50 UTC 2017")
	require.NoError(t, err)
	saml.TimeNow = func() time.Time {
		return tm
	}
	clock := dsig.NewFakeClockAt(tm)
	saml.Clock = clock

	testResponseDecoded, err := base64.StdEncoding.DecodeString(testResponse)
	require.NoError(t, err)
	_, err = testSAMLProvider.ParseXMLResponse(testResponseDecoded, []string{testRequestID}, *testACSURL)
	err = unwrapSAMLError(err)
	require.NoError(t, err)
}

func tamperedResponse(original string) (string, error) {
	decoded, err := base64.StdEncoding.DecodeString(original)
	if err != nil {
		return "", err
	}
	tampered := strings.ReplaceAll(string(decoded), "john@kolide.co", "evil@foobar.com")
	return base64.StdEncoding.EncodeToString([]byte(tampered)), nil
}

func TestVerfiyValidTamperedWithDocFails(t *testing.T) {
	tm, err := time.Parse(time.UnixDate, "Sun Apr 30 22:09:50 UTC 2017")
	require.NoError(t, err)
	saml.TimeNow = func() time.Time {
		return tm
	}
	clock := dsig.NewFakeClockAt(tm)
	saml.Clock = clock

	tamperedSAMLResponse, err := tamperedResponse(testResponse)
	require.NoError(t, err)

	tamperedSAMLResponseDecoded, err := base64.StdEncoding.DecodeString(tamperedSAMLResponse)
	require.NoError(t, err)
	_, err = testSAMLProvider.ParseXMLResponse(tamperedSAMLResponseDecoded, []string{testRequestID}, *testACSURL)
	err = unwrapSAMLError(err)
	require.Error(t, err)
	require.Contains(t, err.Error(), "Signature could not be verified")
}

func unwrapSAMLError(err error) error {
	if err == nil {
		return nil
	}
	if samlErr, ok := err.(*saml.InvalidResponseError); ok {
		err = samlErr.PrivateErr
	}
	return err
}

// Message hasn't been tampered with but is stale
func TestVerfiyStaleMessageFails(t *testing.T) {
	tm, err := time.Parse(time.UnixDate, "Sun Apr 30 22:14:00 UTC 2017")
	require.NoError(t, err)
	saml.TimeNow = func() time.Time {
		return tm
	}
	clock := dsig.NewFakeClockAt(tm)
	saml.Clock = clock

	tamperedSAMLResponse, err := tamperedResponse(testResponse)
	require.NoError(t, err)

	tamperedSAMLResponseDecoded, err := base64.StdEncoding.DecodeString(tamperedSAMLResponse)
	require.NoError(t, err)
	_, err = testSAMLProvider.ParseXMLResponse(tamperedSAMLResponseDecoded, []string{testRequestID}, *testACSURL)
	err = unwrapSAMLError(err)
	require.Error(t, err)
	require.Contains(t, err.Error(), "response IssueInstant expired")
}

var (
	testGoogleMetadata = func() *saml.EntityDescriptor {
		var metadata *saml.EntityDescriptor
		if err := xml.Unmarshal([]byte(`
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<md:EntityDescriptor xmlns:md="urn:oasis:names:tc:SAML:2.0:metadata" entityID="https://accounts.google.com/o/saml2?idpid=C0171bstf" validUntil="2022-07-16T20:07:43.000Z">
  <md:IDPSSODescriptor WantAuthnRequestsSigned="false" protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol">
    <md:KeyDescriptor use="signing">
      <ds:KeyInfo xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
        <ds:X509Data>
          <ds:X509Certificate>MIIDdDCCAlygAwIBAgIGAV1SKeijMA0GCSqGSIb3DQEBCwUAMHsxFDASBgNVBAoTC0dvb2dsZSBJ
bmMuMRYwFAYDVQQHEw1Nb3VudGFpbiBWaWV3MQ8wDQYDVQQDEwZHb29nbGUxGDAWBgNVBAsTD0dv
b2dsZSBGb3IgV29yazELMAkGA1UEBhMCVVMxEzARBgNVBAgTCkNhbGlmb3JuaWEwHhcNMTcwNzE3
MjAwNzQzWhcNMjIwNzE2MjAwNzQzWjB7MRQwEgYDVQQKEwtHb29nbGUgSW5jLjEWMBQGA1UEBxMN
TW91bnRhaW4gVmlldzEPMA0GA1UEAxMGR29vZ2xlMRgwFgYDVQQLEw9Hb29nbGUgRm9yIFdvcmsx
CzAJBgNVBAYTAlVTMRMwEQYDVQQIEwpDYWxpZm9ybmlhMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8A
MIIBCgKCAQEAzLXNn7VmJBkvVNYHffTzDoow/8eSklauVeYjhELY6dtFv56wAQsFNeMovFUPxPeG
7Fci50/KStvoNZOdKqZFCwYkfI2ssXuMpBP37x2iprV7moVwGdGJb52elMNe0DesgTPbJ/IWIvzF
3GYxqYCHUlHuzJEzBYsdtvM8T/PClBxiLXRNbnjotzleFqb25w3XRfayOZg5GdQPeEmceWXDBhCa
eQyEPOrUTZ+//pZXSuKnOyaFfESNFNgvQJlYQQukjnhPtf674eWT6OdgZHyq8EBbZKfEhs5+KiAN
U43bDh9rpTJCB7rAKk1BFAW3r72pggwN9Z/sfp/C5B7uKAM5hwIDAQABMA0GCSqGSIb3DQEBCwUA
A4IBAQAZXypikbbRzichNXLdK96M/do9nGS5Q3xVgA2uxTzm/6qNkAfOSGSk8OcLrppPonbohkeZ
WVnNB5VZZava4DoSZ6OZsvKc1FM0wKvPJd83KUb7Syk1bV7TkT8DPEclfsLnn5s5g0oHlhsqkNly
0WPFTAoGHXYyOKGEARPoC/o+ZfgfvoMNyZkSQHiRboVVP2cT1ckJt4iCA65hNGXte29hSGmnX7QG
QyrBRp8n4UR9PjoeIy0tTCmG0tqu/NackFH4PkamY84Etxe9uH0StmkhID46QTT4Cv2+jqCaklg+
7VYqXbY64Wc/k0sK7WI1o3IVLWAPNb8ajV6Eo0Y8u+1N</ds:X509Certificate>
        </ds:X509Data>
      </ds:KeyInfo>
    </md:KeyDescriptor>
    <md:NameIDFormat>urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress</md:NameIDFormat>
    <md:SingleSignOnService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect" Location="https://accounts.google.com/o/saml2/idp?idpid=C0171bstf"/>
    <md:SingleSignOnService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" Location="https://accounts.google.com/o/saml2/idp?idpid=C0171bstf"/>
  </md:IDPSSODescriptor>
</md:EntityDescriptor>
`), &metadata); err != nil {
			panic(err)
		}
		return metadata
	}
	testGoogleServiceProvider = func() *saml.ServiceProvider {
		idpMetadata := testGoogleMetadata()
		sp := saml.ServiceProvider{
			AcsURL:      *testACSURL,
			IDPMetadata: idpMetadata,
			ValidateAudienceRestriction: func(assertion *saml.Assertion) error {
				return validateAudiences(assertion, []string{"kolide.edilok.net"})
			},
		}
		return &sp
	}()
	testGoogleSAMLResponse = `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`
	testGoogleRequestID    = "SGJhi1g5D4/npOwXaw8t6A=="
)

func TestVerifyValidGoogleResponse(t *testing.T) {
	tm, err := time.Parse(time.RFC3339, "2017-07-18T14:47:08.035Z")
	require.NoError(t, err)
	clock := dsig.NewFakeClockAt(tm)
	saml.TimeNow = func() time.Time {
		return tm
	}
	saml.Clock = clock

	googleSAMLResponseDecoded, err := base64.StdEncoding.DecodeString(testGoogleSAMLResponse)
	require.NoError(t, err)
	_, err = testGoogleServiceProvider.ParseXMLResponse(googleSAMLResponseDecoded, []string{testGoogleRequestID}, *testACSURL)
	require.NoError(t, err)
}

func TestVerifyGoogleResponseTampered(t *testing.T) {
	tm, err := time.Parse(time.RFC3339, "2017-07-18T14:47:08.035Z")
	require.NoError(t, err)
	clock := dsig.NewFakeClockAt(tm)
	saml.TimeNow = func() time.Time {
		return tm
	}
	saml.Clock = clock

	decoded, err := base64.StdEncoding.DecodeString(testGoogleSAMLResponse)
	require.NoError(t, err)
	// Tamper with the response by changing an attribute within the Assertion tag.
	googleSAMLResponseDecoded := bytes.Replace(decoded, []byte("myattribute"), []byte("yourattribute"), 1)

	_, err = testGoogleServiceProvider.ParseXMLResponse(googleSAMLResponseDecoded, []string{testGoogleRequestID}, *testACSURL)
	require.Error(t, err)
	err = unwrapSAMLError(err)
	require.Contains(t, err.Error(), "Signature could not be verified")
}

func TestVerifyInvalidSignatureGoogleResponse(t *testing.T) {
	googleSAMLResponseInvalidSignature := `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`
	tm, err := time.Parse(time.RFC3339, "2017-07-18T14:47:08.035Z")
	require.NoError(t, err)
	clock := dsig.NewFakeClockAt(tm)
	saml.TimeNow = func() time.Time {
		return tm
	}
	saml.Clock = clock
	googleSAMLResponseInvalidSignatureDecoded, err := base64.StdEncoding.DecodeString(googleSAMLResponseInvalidSignature)
	require.NoError(t, err)
	_, err = testGoogleServiceProvider.ParseXMLResponse(googleSAMLResponseInvalidSignatureDecoded, []string{testGoogleRequestID}, *testACSURL)
	require.Error(t, err)
	err = unwrapSAMLError(err)
	require.Contains(t, err.Error(), "cannot validate signature on Assertion")
}

// samlResponseInvalidSignatureAndNamespace's only change is that it has
// `xmlns:saml2="urn:oasis:names:tc:SAML:2.0:assertion-foobar"`
// instead of `xmlns:saml2="urn:oasis:names:tc:SAML:2.0:assertion"“
//
//go:embed testdata/invalid_signature_and_namespace.xml
var samlResponseInvalidSignatureAndNamespace string

//go:embed testdata/multiple_assertions.xml
var samlResponseMultipleAssertions string

//go:embed testdata/missing_assertion.xml
var samlResponseMissingAssertion string

func TestVerifyInvalidSignatureAndNamespace(t *testing.T) {
	tm, err := time.Parse(time.RFC3339, "2017-07-18T14:47:08.035Z")
	require.NoError(t, err)
	saml.TimeNow = func() time.Time {
		return tm
	}
	clock := dsig.NewFakeClockAt(tm)
	saml.Clock = clock

	_, err = testGoogleServiceProvider.ParseXMLResponse([]byte(samlResponseInvalidSignatureAndNamespace), []string{testGoogleRequestID}, *testACSURL)
	err = unwrapSAMLError(err)
	require.Error(t, err)
	require.Contains(t, err.Error(), "expected at least one valid Assertion, none found")
}

func TestVerifyMultipleAssertions(t *testing.T) {
	tm, err := time.Parse(time.RFC3339, "2017-07-18T14:47:08.035Z")
	require.NoError(t, err)
	saml.TimeNow = func() time.Time {
		return tm
	}
	clock := dsig.NewFakeClockAt(tm)
	saml.Clock = clock

	_, err = testGoogleServiceProvider.ParseXMLResponse([]byte(samlResponseMultipleAssertions), []string{testGoogleRequestID}, *testACSURL)
	err = unwrapSAMLError(err)
	require.Error(t, err)
	require.Contains(t, err.Error(), "cannot validate signature on Assertion")
}

func TestVerifyMissingAssertion(t *testing.T) {
	tm, err := time.Parse(time.RFC3339, "2017-07-18T14:47:08.035Z")
	require.NoError(t, err)
	saml.TimeNow = func() time.Time {
		return tm
	}
	clock := dsig.NewFakeClockAt(tm)
	saml.Clock = clock

	_, err = testGoogleServiceProvider.ParseXMLResponse([]byte(samlResponseMissingAssertion), []string{testGoogleRequestID}, *testACSURL)
	err = unwrapSAMLError(err)
	require.Error(t, err)
	require.Contains(t, err.Error(), "expected at least one valid Assertion, none found")
}

func TestVerifyInvalidAssertion(t *testing.T) {
	// Assertion element is <Assertion> instead of <saml2:Assertion>
	const samlResponse = `<?xml version="1.0" encoding="UTF-8"?>
<saml2p:Response Destination="https://localhost:8080/api/v1/kolide/sso/callback" ID="id279242190875310890250292" InResponseTo="foobar" IssueInstant="2017-07-18T14:47:08.035Z" Version="2.0" xmlns:saml2p="urn:oasis:names:tc:SAML:2.0:protocol">
  <saml2:Issuer Format="urn:oasis:names:tc:SAML:2.0:nameid-format:entity" xmlns:saml2="urn:oasis:names:tc:SAML:2.0:assertion">https://accounts.google.com/o/saml2?idpid=C0171bstf</saml2:Issuer>
  <saml2p:Status>
    <saml2p:StatusCode Value="urn:oasis:names:tc:SAML:2.0:status:Success"/>
  </saml2p:Status>
  <Assertion ID="id279242191114126394172996" IssueInstant="2017-07-18T14:47:08.035Z" Version="2.0" xmlns:saml2="urn:oasis:names:tc:SAML:2.0:assertion">
    <saml2:Issuer Format="urn:oasis:names:tc:SAML:2.0:nameid-format:entity">abcd</saml2:Issuer>
    <saml2:Subject>
      <saml2:NameID Format="urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress">{NAME_ID}</saml2:NameID>
      <saml2:SubjectConfirmation Method="urn:oasis:names:tc:SAML:2.0:cm:bearer">
        <saml2:SubjectConfirmationData InResponseTo="foobar" NotOnOrAfter="2017-07-18T14:48:08.035Z" Recipient="https://localhost:8080"/>
      </saml2:SubjectConfirmation>
    </saml2:Subject>
    <saml2:Conditions NotBefore="2017-07-18T14:47:08.035Z" NotOnOrAfter="2017-07-18T14:48:08.035Z">
      <saml2:AudienceRestriction>
        <saml2:Audience>https://localhost:8080</saml2:Audience>
      </saml2:AudienceRestriction>
    </saml2:Conditions>
    <saml2:AuthnStatement AuthnInstant="2017-07-18T14:47:08.035Z" SessionIndex="foobar">
      <saml2:AuthnContext>
        <saml2:AuthnContextClassRef>urn:oasis:names:tc:SAML:2.0:ac:classes:PasswordProtectedTransport</saml2:AuthnContextClassRef>
      </saml2:AuthnContext>
      <saml2:AttributeStatement>
        <saml2:Attribute Name="FLEET_JIT_USER_ROLE_GLOBAL" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:basic">
            <saml2:AttributeValue xsi:type="xs:string">admin</saml2:AttributeValue>
        </saml2:Attribute>
    </saml2:AttributeStatement>
    </saml2:AuthnStatement>
  </Assertion>
</saml2p:Response>`
	tm, err := time.Parse(time.RFC3339, "2017-07-18T14:47:08.035Z")
	require.NoError(t, err)
	saml.TimeNow = func() time.Time {
		return tm
	}
	clock := dsig.NewFakeClockAt(tm)
	saml.Clock = clock

	_, err = testGoogleServiceProvider.ParseXMLResponse([]byte(samlResponse), []string{"foobar"}, *testACSURL)
	err = unwrapSAMLError(err)
	require.Error(t, err)
	require.Contains(t, err.Error(), "expected at least one valid Assertion, none found")
}
